You are right I also thought about that, but I wanted to make it kind of a miserable game where you really dont have any hope of surviving since there will always be more zombies etc. which is also the reason the road generates endlessly and the closer you get the more road you have to drive on, and if I allowed the car to just slam into zombies without any damage then it wont be as satisfying if you play for longer time with fear factor, this is if I incorporated my whole idea with survival mechanics which I didnt, so its my fault XD
Thanks for playing!